I can download aircraft from Avsim.com without any problem. I then copy the file - which is, by this time, unzipped - and paste it in FS2002/Aircraft. No problems. But not all aircraft have the 'install now' option, thus resulting in them not being installed at all. I have not changed any names. Why is this? How can I remedy it? Mysteriously, some aircraft can be installed and then flown quickly, but most can't be installed and thus not flown.

"Everyone writing for the Telegraph knows that the way to grab eyeballs is with Ryanair and/or sex."

A lot of aircraft files on Avsim.com don't have the 'install now' button, you have to copy the whole file to the aircraft file in FS2002. I can't really remember how to do it now as I have FS2004 and don't need to use WinZip. But just right click on the yellow folder named whatever...'Virgin A340-600'...And paste it in to your aircraft folder.